This alert expired on 13 August 2026 at 20:45 UTC. It is kept here as a record.
No stronger detection stands among the 48 recorded within 20 km of this point since 27 June 2026 — 26 others scored the same. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 13 at 4:34PM EDT until August 13 at 4:45PM EDT by NWS Greenville-Spartanburg SC
An estimated 267,021 people live within 50 km of this point.
Nearby, since 27 June 2026
- August 10, 2026 · score 43 · 5.3 km
- August 29, 2026 · score 43 · 7.4 km
- August 28, 2026 · score 43 · 7.4 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 76 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 76% |
| Coordinates | 34.6660, -82.2820 |
| Nearest City | Simpsonville (9 km) |
| Population Exposed | 267.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-13T20:34:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Greenville, SC; Laurens, SC |
| Headline | Severe Thunderstorm Warning issued August 13 at 4:34PM EDT until August 13 at 4:45PM EDT by NWS Greenville-Spartanburg SC |
| Expires | 2026-08-13T16:45:00-04:00 |
| SenderName | NWS Greenville-Spartanburg SC |
| HasExactCoords | true |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 10 February 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
Calamity.live data shows a weather event with CalamityScore 43/100, near Simpsonville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.